Tuning
Servicing
Book a service Manufacturer-spec servicing that keeps your warranty, with an 85-point health check included. Prices on the page for your make.
See prices →
Courtesy cars · Mon-Fri 8-5, Sat 8-1
Something wrong with it? Tell us the symptoms or the fault code and we will say what it is likely to be and what it costs to look at.
Ask a technician →
Parts
Only parts that fit Type your reg in the plate above and the shop shows only the parts that fit your exact car, with the tuning figures next to them.
Open the shop →
31,000 parts · fitted here or shipped · pay with Klarna or PayPal
Specialist vehicles
Specialist vehicles: case studies by make All case studies →
Hover a make for its models. Every case study is a real car on our dyno: before, after, what we did and what it made.
Help centre
Fault code lookup Type the code your scanner gave you. We tell you what it means on your make, whether it is an MOT problem, and what usually causes it.
Look up a code →
Hand-written descriptions, not a copied list
Trade
1 Read2 Upload3 Portal4 Download5 Write
703 Files last month
16 min Average turnaround
833+ Dealers
24 Countries
24/7 files Bot online · 24/7 File desk open · closes 5pm Already developed that ECU and software? Our system matches it and sends it straight back to your account, day or night, weekends included. New files are written by hand on our own dyno data while the desk is open: Mon-Fri 8am-5pm, Sat 8am-1pm. How the file service works →
Tools we sell, from £1,600 ex VAT MagicMotorsport Flex from £1,600, Alientech KESS3 £2,590, Autotuner from £2,100, Flashtec CMD from £3,105. Slave versions, training and support included. Compare the tools →
Become a JFA dealer Files written by the people who tune the cars, on our own dyno, and matched files back 24/7. 833+ dealers in 24 countries, no monthly fee, pay per file.
Become a dealer →
16 minutes average turnaround last month
About
Mon-Fri 8:00am - 5:00pm
Saturday 8:00am - 1:00pm
Sunday Closed
Find us Unit 31 Integra, Parkwood Industrial Estate, Bircholt Road, Maidstone ME15 9GQ
Directions →
Want to talk to someone? Call 01622 321500, WhatsApp us, or send the reg and we will come back with a price.
Contact us →
Searches the whole site: cars we tune, parts, case studies, the Help Centre, services and news. Try RS21JFA P0420 Golf R Milltek AdBlue
Stage 1, 2 and 3 figures and the price for your exact engine
Search a car, part, fault code…
Pay with Klarna See our finance options→
Tuning
Servicing & repairs
Parts & exhausts
Specialist vehicles
Help centre
About Mon-Fri 8am-5pm Sat 8am-1pm Sun closed Unit 31 Integra, Parkwood Industrial Estate, Bircholt Road, Maidstone ME15 9GQ
Trade & dealers
Maidstone, Kent
Car tuning
Remapping, gearbox tuning, rolling road sessions and performance parts, written and proven here in Maidstone. Start with your registration to see the figures for your car.
Since 2011 Mustang AWD dyno Fixed prices
Tuning
Choose what you need
Figures for your car Your standard and Stage 1, 2 and 3 figures and prices from your registration.
See your figures →
Stage 1, 2 and 3 What each stage involves, what it costs and what it does to the car.
Compare the stages →
Rolling road sessions Power runs and tuning on our Mustang AWD dyno.
Book the dyno →
Gearbox tuning Faster shifts and raised torque limits for DSG, ZF and other automatics.
Gearbox tuning →
Mobile tuning Stage 1 at your home or work through our sister company Remaps UK.
Mobile tuning →
Every make we tune Find your make, model and engine in our catalogue.
All makes →
Your car
See the figures for your car
Put your registration in and you get the standard figures, what each stage does and the price, before you give us any details.
More from our workshop
Other services
Try our tuning builder
Build your tune
Enter your reg and see the real power and torque figures for your exact car,
pick your options, then send it straight to us.
Open the builder →
Meet the team
The team behind every job
Technicians, calibrators and the front desk, all in Maidstone. No call centre and no subcontracting - the person who books you in is the person you can ask about the job.
Newsletter
Offers on parts and tuning, first
A short email now and then: new vehicle support, parts deals, open days. Nothing daily.